t = [0 50 96 180 254 296 414 496];
UL = [2.98 2.43 2.03 1.42 1.01 0.83 0.4 0.21];
% scatter(t,UL);
% lnUL = log(UL);
% scatter(t,lnUL);
% hold on;
% p = polyfit(t,lnUL,1);
% x = 0:0.1:500;
% y = p(1).*x+p(2);
% plot(x,y);
% xlabel('t/us');
% ylabel('lnU_{L}/v');
% k = num2str(p(1));
% b = num2str(p(2));
% text(350,0.5,['y=' k 'x+' b]);